Feed apparatus for spiral separators.



APPLICATION FILED APR.11, 1910.

Patented Nov. 29, 1910.

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F. PARDEE. FEED APPARATUS FOR SPIRAL SEPARATORS. APPLICATION FILED APR. 11, 1910.

977,038. Patented Nov. 29, 1910.

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WITNESSES:

"WEI/T08 ATTORNEY F. PARDEB. FEED APPARATUS FOR SPIRAL SBPARATORS.

Patented Nov. 29, 1910.

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Za at J/M F. PARDEE. FEED APPARATUS FOR SPIRAL SEPARATORS.

APPLIOATION FILED APB..11, 1910.

Patented Nov. 29, 1910.

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lUNTTED STATES PATENT OFFICE FRANK PARDEE, OF I-IAZLETON, PENNSYLVANIA, ASSIGNOR TO ANTHRACITE SEPARATOR COMPANY, A CORPORATION OF PENNSYLVANIA.

FEED APPARATUS FOR SPIRAL SEPABATORS.

Specification of Letters Patent.

Patented Nov. 29, 1910.

Application filed April 11, 1910. Serial No. 554,875.

To all whom it may concern:

Be it known that I, FRANK PARDEE, a citizen of the United States, residing in Hazleton, county of Luzerne, and State of Pennsylvania, have invented certain new and useful Improvements in Feed Apparatus for Spiral Separators, of which the following is a specification, reference being had to the accompanying drawings.

The improvement, or invention, has relation to spiral separators used chiefly in removing slate and bone from coal. Such spiral separators are usually constructed of a series of plates or ackets encircling a central post, and having a pitch toward the axis and also downwardly. The plates have been variously formed, and provided with retarding surfaces to accentuate the diiference of action of gravity, frictional resistance and centrifugal force, to which the mixed substances are automatically subjected in machines of the character stated.

Along with the action of the three operative forces, and as means contributing to a differential action, the inward pitch of the plates or jackets and various retarding surfaces, have been the structural features for giving the slate the inside course, the bone a middle course, and the coal the outside course. In spirals having a separate coalthread, the coal is carried by centrifugal force, off the slate thread which serves to re.- tain slate and bone, but a further separation may be made on the coal-thread, of stray pieces of slate or bone which may pass to it.

The objects of the present invention are to provide feed-apparatus which will give to the different substances a primary spread and impetus in the directions, or courses, needed for their separation; and to construct this feed-apparatus so as to adapt it not only for an aid to the spiral in the process of separation, but also to the feeding of the mixed materials to one or more spiral threads, as may be required.

The invention consists primarily of a feed-plate constructed and adapted to give an entering spread to the mixed substances; and of such a plate provided with surfaces adapted to retard the heavier materials, and, also, in combination with this feed-plate, of a concentrating trough and other suitable connections with the main supply chute in of a spiral separator having two slate threads and a coal-thread, and shows the feed-plate and other connections; the dotted lines in this figure simply indicate upright and cross supports in the breaker. Fig. 2, is a side elevation of the same, and shows about two turns at the upper end of a spiral. Fig. 3, is an end view of two lengths or sections forming a supply chute or feeder, and Fig. his a perspective view of the same parts, in connection with concentrating troughs for a two-thread feed. The feedplate which connects with the spiral is separately shown in perspective, by Fig. 5, and in cross section on the line 5, 5, by Fig. 6. Fig. 7, is a modified form of the supply chute or feeder with the same general form of concentrating troughs and connections for supplying three feed-plates fora threethread spiral. Fig. 7, is a longitudinal section taken on the line 8, 8, of Fig. 8, and Fig. 8, is a cross section through the lines 7, 7, of Fig. 7. Fig. 9 is a plan view of a modified form of the feeder or supply elements.

In Figs. 1, and 2, of the drawings the form of spiral shown has two slate-threads and one coal-thread, and consists of a central post A, around which the plates or jackets B, are secured by supporting rods a. The coal thread is provided with an outer inclined flange 7), for preventing the coal from being carried off and out of the spiral by centrifugal force. The supports C, have nothing to do with the spiral, but are made use of for connecting and supporting the feed-apparatus by straps 0, or in any other suitable way.

The feed-plate D, as shown, connects at its lower end with the upper plate of one of the slate-threads, and at its upper end it preferably connects with the lower end of a concentrating trough E. The feed-plate D, as seen in Figs. 1, 2, 5, and 6, is somewhat angular and 1s set with an inward inclination, the bottom being higher at the outer side. This feed-plate D, has an inner sidepiece or flange (Z, and two outer inclined flanges (Z d the latter being higher than the former, and changes direction, as seen in Fig. 5, so as to give a turn and circular starting motion to the materials coming against it,'before they pass to 'the first plate of the spiral. The bottom of the feed-plate D, isprovided with retarding surfaces (1", consistlngof angle cuts and raised surfaces, the rise being made to increase to the free lower corner. There is also a ridge formed by an angle bend (Z adjacent to the flange 6Z2, for giving to the slate and bone which may pass the angle cuts, (Z a further slowing up and inward turning motion without seriously interrupting jorxunduly changing diverter of the materials.

the course of the coal.

The feed-plate D,-may be variously modified in its constructive features, its functions being those of a retarderand spreader or In slowing up, gravity will cause the heavier materials to change their course inwardly, and the feedplate will aid the spiral to perform its separating function with a shorter run of the materials than is usually the case.

The feed-plate .D, is the chief factor of the present invention, and the other connections may be of the forms shown, or of other forms, but as shown they are important in V preliminarily concentrating the mixed substances and in feeding more than one spiralthread to the best advantage. The V-shaped concentrating trough E, has its lower end resting in the upper end'of the feed-plate D, which is suitably secured to it, as by pivots e. 1 The trough E,huddles themate rials together and on escaping from it they will quickly spread, and the spreading action will be accentuated by the feed plate D in such a way as to give them a start in proper directions.

A two-thread feed is shown in Figs. 1, and 2, and the V-shaped troughs E, E, with their feeder or supply connections F, and G, for. leading the materials from the breaker chute, are shown in Fig. 4. Both of these V-shaped troughs E, have sides 6 c and the lower trough has additional flanges e 6 which form sides, as it were, extending up as high as the upper trough, which sides 6 e adapt the lower of the two troughs to the reception of the materials which come from the feeder section F, or which may run over the adjacent edge of the upper trough E. The flange or side piece 6 has a partition a for precipitating the materials com- 5sing from the runway F, and it also has an overturned part a forming an end as it were, for limiting the feed space and for precipitating the materials which may run over and be fed to it from the adjacent side of the upper trough. The materials which enter the lower'trough, are huddled and given a clear run'in the V-shaped part of the trough, then pass to the feed-plate D, and from thence to the upper jacket of the spiral. V

The supply element or section G, of the apparatus as shown for a two-thread feed, is a simple flanged element with one of its sides g, at an angle best shown in Fig. l, the other side 9 being practically straight. In this arrangement the materials coming from the breaker chute are directed toward the outer or straightside g and are more effectually controlled by the feed or supply element F, which empties into the V-shaped concentrating troughs E.

The element F of the feeder consists of a flanged side f, and a receding gutter 7, formed diagonally in the bottom, so that its larger lower part takes up about one-half of the width, while its narrowest part takes its start at the upper end near the side flange f, which is at a different angle, from the angle side 9 of the element G, as seen in Fig. l. The flat parts f of the bottom of the element F, supports, and is partially covered by, an angle piece f having an angle side j, which forms one side of the element F.

The angle piece f, is pivotally secured at 9 to the element G, and it also has a pivot 9 which moves in a slot in the fiat bottom part P, so that it may be moved inwardly and direct the feed to the upper V-shaped trough entirely. Intermediate adjustments of the angle piece f will regulate the volume of feed to one or the other concentration trough.

In a three-thread feed, the formation of the upper V-shaped trough is the same as it would be for a single thread or for a two thread feed, and likewise the second trough E, may be practically the same as in a twothread feed. The third or lower V-shaped trough E, takes its feed from the opposite side of the supply element F to that from which the second trough is fed.

In a three-thread feed with a concentration trough for each feed-p1ate the supply elements F and G are modified. These elements, as modified, are shown in plan by Fig. 9. In this instance the upper section G, has a bottom with angle gutters g g diverging from near the upper outer corners so that the flat part 9 of the bottom surfaces converges and comes to a point or terminates near the greatest divergence of the side gutters. This fiat part also assumes a V-shape as seen in Fig. 9. In connection with this arrangement the central part of the bottom of the element F, is so bent as to form a central V-shaped gutter 7*, which diverges downwardly, and side gutters f, receive the materials from the angle gutters g g. The side gutters f, f, converge and flatten or become more shallow in a downwardly direction. The side flanges of the supply element F, are, in this instance, angle-pieces, each of which are pivotally secured at 9, to the element G, and pivotally connected at f, to the bottom of the element F, which is also provided with slots for permitting an inward or outward movement for regulating the feed to the second V- shaped trough.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A spiral separator feed-plate formed with varied retarding surfaces adapted to impart an entering spread and circular tendency to the mixed substances, whereby further separation by the spiral may be facilitated.

2. A spiral separator feedplate adapted to give an entering spread and circular tendency to the mixed substances, said plate be ing provided with retarding surfaces and with angular outer flanges for acting on the different materials.

3. A spiral separator feed-apparatus comprising a trough, in combination with a feed plate adapted to give an entering spread and circular tendency to the different materials, said trough being adapted to concentrate the materials prior to passing on the plate, said feed-plate being provided with retarding surfaces for the heavier materials.

4. A feed apparatus for separate threads of a spiral separator, comprising a trough for each thread to be fed, said trough being adapted to feed the materials from one point, in combination with a feed plate for each thread to be fed, said feed plates being adapted to receive the materials, passing from the exit point of said trough, and to give them an entering spread and circular tendency.

5. A feed apparatus for a spiral separator comprising a feed plate adapted to give an entering spread and circular tendency to the materials passing to the spiral, in combination with a trough adapted to discharge the supplyof materials from a single point to said plate, and adjustable means for conveying the mixed substances from a source of supply to said trough.

FRANK PARDEE.

Witnesses:

ANNA M. VVETTERAU, LILLIAN SAUNDERS. 

